package com.mmall.concurrency.example.atomic;

import com.mmall.concurrency.annotions.ThreadSafes;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;

@Slf4j
@ThreadSafes
public class AtomicExample_1 {
    
    //请求总数
    public static  int  clientTotal = 5000;
    
    //同时并发执行的线程数
    public  static  int  threadTotal=100;
    
    
    public static AtomicInteger count= new AtomicInteger(0);
    
    
    public static void main(String[] args)  throws  Exception{
    
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore= new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        
        for (int i = 0; i< clientTotal; i++){
            executorService.execute(()->{
                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                    
                }catch (Exception e){
                    log.error("Exception",e);
                }
                countDownLatch.countDown();
            });
        }
        
        countDownLatch.await();
        executorService.shutdown();
        log.info("count: {}",count.get());
        
    }
    
    public static void add(){
        count.incrementAndGet();
    }
}
